\newcommand{\KM}{{\cal M}}
\newcommand{\KP}{{\cal P}}
\newcommand{\KC}{{\cal C}}
\newcommand{\KK}{{\cal K}}
\newcommand{\KE}{{\cal E}}
\newcommand{\KD}{{\cal D}}
\newcommand{\RENGA}{{\textbf{\textit{RENGA}} }}
\newcommand{\MJU}{{\textbf{\textit{MakeJavaUseful}} }}
\newcommand{\cvo}{Carl von Ossietzky Universit\"at Oldenburg }